How does extra credit change my grade?

Extra credit is added on top of your earned points without increasing the total possible points: newPercent = (earned + extraCredit) / totalPossible × 100. This is why even a few extra points can lift your percentage measurably.

Why doesn't the denominator increase?

Most instructors design extra credit as a bonus, not an extra assignment, so it raises your numerator while the total stays fixed. If your course adds extra credit to the denominator instead, the boost is smaller — check your syllabus.

What letter grade scale is used?

The tool uses the common US scale: A 90+, B 80-89, C 70-79, D 60-69, F below 60. It reports both your numeric percentage and the corresponding letter so you can see whether extra credit crosses a threshold.

Can extra credit push me over 100%?

Yes, mathematically. If earned plus extra credit exceeds the total possible, your percentage can exceed 100%. The tool shows the raw figure so you can see the cushion, though most gradebooks cap the displayed grade at 100%.

How much extra credit do I need for the next letter?

The tool reports the gap to the next letter grade in points, so you can see exactly how many extra credit points would lift you from, say, a B to an A.

Extra Credit GPA Impact Calculator

Email me this result

Get this tool's output sent to your inbox, plus one useful tool a week. No spam, unsubscribe any time.

See how extra credit moves your grade

Extra credit feels valuable, but it is easy to overestimate. This calculator shows the exact percentage and letter-grade change extra credit produces, based on how most courses apply it: as bonus points added to your earned total without changing the total possible. You will see your grade before and after, and how close you are to the next letter.

How it works

The standard extra-credit formula adds the bonus to the numerator only:

beforePercent = earned / totalPossible × 100
afterPercent  = (earned + extraCredit) / totalPossible × 100
gain          = afterPercent − beforePercent

The resulting percentages map to letter grades on the common US scale (A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, F otherwise). The tool also computes how many points stand between your new grade and the next letter threshold.

Tips and notes

Confirm whether your course adds extra credit to the numerator (bonus) or the denominator (extra assignment) — the first is far more generous.
A small bonus on a course with a large total possible barely moves the needle; the same bonus on a small total is much stronger.
If you are just under a threshold, the “points to next letter” figure tells you the minimum extra credit worth chasing.